EP2512684B1 - Ensemble de séparation composé d'un séparateur par gravité suivi d'un séparatuer centrifuge - Google Patents

Ensemble de séparation composé d'un séparateur par gravité suivi d'un séparatuer centrifuge Download PDF

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Publication number
EP2512684B1
EP2512684B1 EP10798032.8A EP10798032A EP2512684B1 EP 2512684 B1 EP2512684 B1 EP 2512684B1 EP 10798032 A EP10798032 A EP 10798032A EP 2512684 B1 EP2512684 B1 EP 2512684B1
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Prior art keywords
dwell
liquid
gas stream
time vessel
drop separator
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EP10798032.8A
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German (de)
English (en)
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EP2512684A1 (fr
Inventor
Jörg HALPAP
Andreas Bode
Eberhard Herrmann
Markus LINSENBÜHLER
Bernd Sachweh
Michael Pilz
Michael Mertler
Matthias Wilhelm Meier
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BASF SE
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BASF SE
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
    • B04C5/13—Construction of the overflow ducting, e.g. diffusing or spiral exits formed as a vortex finder and extending into the vortex chamber; Discharge from vortex finder otherwise than at the top of the cyclone; Devices for controlling the overflow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
    • B04C5/04—Tangential inlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/103—Bodies or members, e.g. bulkheads, guides, in the vortex chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
    • B04C5/181—Bulkheads or central bodies in the discharge opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
    • B04C5/185—Dust collectors
    • B04C5/187—Dust collectors forming an integral part of the vortex chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks

Definitions

  • the invention relates to a device for separating liquid droplets from a feed gas stream containing them.
  • Centrifugal droplet separators also referred to as cyclones, are known in the art and are used, for example, for separating liquid droplets from gas streams containing them.
  • Centrifugal drop separators are rotationally symmetrical apparatus, usually with a vertical axis of rotation, often predominantly cylindrical apparatuses.
  • By tangentially introducing the biphasic liquid / gas mixture to be separated it is imparted a helical motion along the inner wall of the apparatus, whereby separation of the components of the mixture as a function of their density occurs under the action of the centrifugal force.
  • the heavier liquid droplets are deposited from the gas on the inner walls of the Zentrifugaltropfenabscheiders, accumulate in the lower part of the apparatus and are discharged through a discharge nozzle.
  • gas streams having a higher liquid loading than the limiting charge for a centrifugal droplet separator must first be depleted to a liquid content below the limit loading that can be applied to the centrifugal droplet separator prior to delivery to a centrifugal droplet separator in a preseparator or coarse separator.
  • a residence vessel can be used, wherein the liquid droplets are deposited under the action of gravity, which must be sufficiently large to ensure the required pre-separation (coarse separation).
  • the GB 700 511 A describes an apparatus and method for separating entrained solid particles from a gas or vapor comprising a deposition chamber for a non-fluidized solid bed. a cyclone disposed above or within the deposition chamber and having a discharge port terminating above the surface of the fluidized bed; and an ejector disposed in the cyclone and operated with a secondary gas or vapor stream to control the pressure difference between gas or to compensate for steam outside the discharge nozzle and in the center of the vortex in the cyclone.
  • the discharge nozzle from the cyclone necessarily ends above the solid bed in the residence vessel.
  • an ejector is arranged in the cyclone, which compensates for the pressure loss between the gas or steam outside the discharge nozzle and the center of the vortex in the cyclone.
  • a combination of a residence time vessel and a cyclone is also provided for the separation of liquid droplets from a feed gas stream containing these, wherein, however, the discharge nozzle is immersed for the liquid deposited in the centrifugal droplet separator or in a liquid standing in a cup inside the residence time vessel.
  • This embodiment reliably prevents entrainment of droplets and thus ensures high degrees of separation.
  • a device for separating liquid droplets from a feed gas stream containing them with a liquid loading of> 10 l liquid / m 3 feed gas comprising a residence time vessel for pre-separation of a portion of the liquid droplets from the feed gas stream under the action of gravity, with a feed line for the feed gas stream into the residence vessel and a discharge line for the liquid droplet depleted, flowing out of the residence time vessel gas stream and at least one tangential supply thereof to a Zentrifugaltropfenabscheider, wherein a fine separation, and wherein the discharge line in the upper region of the residence vessel and with a discharge line for the liquid deposited in the residence vessel at the bottom thereof, and wherein as Zentrifugaltropfenabscheider an axially symmetrical apparatus with vertical longitudinal axis and circular cross section, with a jacket, and hoods at the top and at the bottom of the jacket is used, and wherein in the region of the lower hood of the Zentrifugaltropfena
  • the residence time vessel is designed as a predominantly cylindrical apparatus with a horizontal longitudinal axis, wherein the feed line for the feed gas stream and the discharge line for the gas stream depleted of liquid droplets are respectively arranged in the upper area thereof and preferably as far apart as possible.
  • the discharge port for the liquid deposited in the centrifugal droplet separator into the residence vessel must be immersed in the residence vessel in order to avoid a bypass flow of the feed gas stream from the residence vessel into the centrifugal droplet separator via the discharge nozzle, without pre-separation of a portion of the To prevent liquid droplets from the feed gas stream under the action of gravity in the residence vessel.
  • the discharge nozzle may be designed so that it ends below the liquid level of the deposited at the bottom of the residence time vessel liquid, but it is also possible that the discharge nozzle ends in a cup below the liquid level of a liquid therein.
  • the cup must be located inside the residence vessel, but its geometry, dimensions and positioning in the residence vessel are not limited.
  • the liquid in the cup is the same as the liquid deposited in the residence time vessel.
  • the variant with immersion of the discharge nozzle into a cup filled with liquid has the advantage over the variant with immersion in the liquid standing at the bottom of the residence vessel that the liquid holdup in the cup can be smaller.
  • an apex cone open at the bottom is preferred.
  • the centrifugal droplet separator has a downwardly open drip apron in the area of the upper hood around the gas outlet duct, at which liquid droplets are separated from the gas flow which exits via the gas outlet duct.
  • the drip apron is preferably longer by at least about 20% than the part of the gas outlet line projecting into the interior of the centrifugal droplet separator, which is also referred to as a dip tube.
  • the tangential feeding of the effluent from the residence vessel via the discharge line in the Zentrifugaltropfenabscheider gas flow takes place via an inlet, which can be geometrically different: it can be circular, for example, which is particularly advantageous in printing apparatus, square or rectangular.
  • the tangential feeding of the effluent from the residence vessel gas flow via the discharge line into the Zentrifugaltropfenabscheider via a rectangular inlet, whose height is greater than its width.
  • the height to width ratio of the rectangular inlet into the centrifugal droplet separator is in the range of 2.5: 1 to 5: 1, preferably 3: 1.
  • two, three or more inlet openings for a tangential supply of rinsing liquid arranged symmetrically around the circumference of the upper hood, in the same direction as the supply of the depleted gas stream from the residence time vessel into the centrifugal droplet separator the discharge line, provided.
  • the rinsing liquid is adapted to the respective substance system, in particular it should under process conditions, do not vaporize or have only a low vapor pressure and should preferably be miscible with the separated from the feed gas stream.
  • FIG. 1 shows a longitudinal section through an embodiment of an apparatus according to the invention for the separation of liquid droplets from a gas stream.
  • the in FIG. 1 shown compact separator comprises a residence vessel 1 with supply 2 for the feed gas and discharge line 3 for the liquid droplets depleted, flowing out of the residence vessel 1 gas stream and tangential supply thereof via a in the figure shown in the preferred embodiment angular inlet to a Zentrifugaltropfenabscheider 4. Die Outlet line 3 is arranged in the upper region and the inlet 2.
  • the residence vessel 1 has at its lower, the feed 2 opposite end of a discharge line 5 for the deposited in the residence vessel liquid.
  • the centrifugal droplet separator 4 is in the preferred embodiment shown in the figure, a highly cylindrical apparatus, with supply of the partially depleted gas stream from the residence vessel 1 via the discharge line 3 and discharge of the purified gas stream via the central gas outlet nozzle 7.
  • a lower open Apexkegel 8 to protect the already deposited liquid and to stabilize the central vortex arranged, and flow breaker 9 in the form of perpendicular to the bottom of the lower hood, radially arranged sheets.
  • the discharge line 6 at the lower end of the Zentrifugaltropfenabscheiders extends to below the liquid level in the residence time vessel first

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • Cyclones (AREA)

Claims (7)

  1. Procédé pour la séparation de gouttelettes de liquide d'un courant de gaz d'alimentation les contenant, avec une charge de liquide du courant de gaz d'alimentation supérieure à 10 1 de liquide par m3 de gaz d'alimentation, dans un dispositif comprenant un récipient de séjour (1) pour la séparation préalable d'une partie des gouttelettes de liquide du courant de gaz d'alimentation sous l'effet de la gravité, avec une conduite d'apport (2) pour le courant de gaz d'alimentation dans le récipient de séjour (1) et une conduite d'évacuation (3) pour le courant de gaz appauvri en gouttelettes de liquide, sortant du récipient de séjour (1), et pour l'apport tangentiel de celui-ci dans un séparateur de gouttes centrifuge (4), la conduite d'évacuation (3) étant disposée dans la région supérieure du récipient de séjour (1) au-dessus du niveau de liquide du liquide séparé et étant espacée de la conduite d'apport (2) dans une mesure telle que le temps de séjour du courant de gaz dans le récipient de séjour (1) soit maximal, et avec une conduite d'évacuation (5) pour le liquide séparé dans le récipient de séjour (1) au fond de ce dernier,
    et un appareil à symétrie axiale avec un axe longitudinal vertical et une section transversale circulaire, comprenant une enveloppe et des couvercles à l'extrémité supérieure et à l'extrémité inférieure de l'enveloppe, étant utilisé en tant que séparateur de gouttes centrifuge (4) et, dans la région du couvercle inférieur du séparateur de gouttes centrifuge (4), étant disposée une tubulure d'évacuation (6) pour le liquide séparé dans le séparateur de gouttes centrifuge (4), laquelle tubulure est dimensionnée de telle sorte qu'elle plonge dans le liquide se trouvant au fond du récipient de séjour (1) ou dans un liquide se trouvant dans une coupelle à l'intérieur du récipient de séjour (1), et avec une tubulure de sortie de gaz centrale (7) à l'extrémité supérieure du séparateur de gouttes centrifuge (4) pour le courant de gaz nettoyé davantage dans le séparateur de gouttes centrifuge (4), et l'apport du courant de gaz appauvri en gouttelettes de liquide à partir du récipient de séjour (1) par le biais de la conduite d'évacuation (3) ainsi que l'évacuation du liquide séparé dans le séparateur de gouttes centrifuge (4) par le biais de la conduite (6) dans le récipient de séjour (1) s'effectuant sans l'utilisation de pompes et d'organes d'arrêt.
  2. Procédé selon la revendication 1, caractérisé en ce que le temps de séjour du courant de gaz dans le récipient de séjour (1) est d'au moins deux minutes.
  3. Dispositif pour séparer des gouttelettes de liquide d'un courant de gaz d'alimentation les contenant, avec une charge de liquide > 10 1 de liquide par m3 de gaz d'alimentation, comprenant un récipient de séjour (1) pour la séparation préalable d'une partie des gouttelettes de liquide du courant de gaz d'alimentation sous l'effet de la gravité, avec une conduite d'apport (2) pour le courant de gaz d'alimentation dans le récipient de séjour (1) et une conduite d'évacuation (3) pour le courant de gaz appauvri en gouttelettes de liquide, sortant du récipient de séjour (1), et au moins un apport tangentiel de celui-ci à un séparateur de gouttes centrifuge (4), dans lequel s'effectue une séparation fine,
    et la conduite d'évacuation (5) étant disposée dans la région supérieure du récipient de séjour (1) et étant espacée au maximum de la conduite d'apport (2), et comprenant une conduite d'évacuation pour le liquide séparé dans le récipient de séjour (1) au fond de ce dernier,
    et un appareil à symétrie axiale avec un axe longitudinal vertical et une section transversale circulaire, comprenant une enveloppe et des couvercles à l'extrémité supérieure et à l'extrémité inférieure de l'enveloppe, étant utilisé en tant que séparateur de gouttes centrifuge (4),
    et, dans la région du couvercle inférieur du séparateur de gouttes centrifuge (4), étant disposée une conduite d'évacuation (3) pour le liquide séparé dans le séparateur de gouttes centrifuge (4), laquelle est conçue de telle sorte qu'elle plonge dans le liquide se trouvant au fond du récipient de séjour (1) ou dans un liquide se trouvant dans une coupelle à l'intérieur du récipient de séjour (1), et avec une conduite de sortie de gaz (7) à l'extrémité supérieure du séparateur de gouttes centrifuge (4) pour le courant de gaz nettoyé davantage dans le séparateur de gouttes centrifuge (4),
    et l'apport du courant de gaz appauvri en gouttelettes de liquide à partir du récipient de séjour (1) par le biais de la conduite d'évacuation (3) dans le séparateur de gouttes centrifuge (4) ainsi que l'évacuation du liquide séparé dans le séparateur de gouttes centrifuge (4) par le biais de la conduite d'évacuation (6) dans le récipient de séjour (1) s'effectuant sans l'utilisation de pompes et d'organes d'arrêt, caractérisé en ce que le récipient de séjour (1) est réalisé sous forme d'appareil principalement cylindrique avec un axe longitudinal horizontal, et la conduite d'apport (2) pour le courant de gaz d'alimentation ainsi que la conduite d'évacuation (3) pour le courant de gaz appauvri en gouttelettes de liquide étant disposées à chaque fois dans la région supérieure du récipient de séjour et de préférence à une distance maximale l'une de l'autre, aux deux extrémités du récipient de séjour (1).
  4. Dispositif selon la revendication 3, caractérisé en ce que le séparateur de gouttes centrifuge (4) présente, au-dessus de la tubulure d'évacuation (6), à son extrémité inférieure, un cône de sommet (8), ainsi que des brise-flux (9) sous la forme de tôles verticales disposées radialement au fond du couvercle inférieur.
  5. Dispositif selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que le séparateur de gouttes centrifuge (4) présente, dans la région du couvercle supérieur, autour de la conduite de sortie de gaz (7), un tablier d'égouttage ouvert vers le bas (10) au niveau duquel des gouttelettes de liquide sont séparées du courant de gaz qui sort par la conduite de sortie de gaz (7).
  6. Dispositif selon l'une quelconque des revendications 3 à 5, caractérisé en ce que l'apport tangentiel du courant de gaz sortant du récipient de séjour (1) s'effectue par le biais de la conduite d'évacuation (3) dans le séparateur de gouttes centrifuge (4) par le biais d'une entrée rectangulaire, dont la hauteur est supérieure à sa largeur.
  7. Dispositif selon la revendication 6, caractérisé en ce que le rapport hauteur/largeur de l'entrée rectangulaire dans le séparateur de gouttes centrifuge (4) est de l'ordre de 2,5:1 à 5:1, de préférence de 3:1.
EP10798032.8A 2009-12-15 2010-12-13 Ensemble de séparation composé d'un séparateur par gravité suivi d'un séparatuer centrifuge Active EP2512684B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10798032.8A EP2512684B1 (fr) 2009-12-15 2010-12-13 Ensemble de séparation composé d'un séparateur par gravité suivi d'un séparatuer centrifuge

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09179221 2009-12-15
EP10798032.8A EP2512684B1 (fr) 2009-12-15 2010-12-13 Ensemble de séparation composé d'un séparateur par gravité suivi d'un séparatuer centrifuge
PCT/EP2010/069516 WO2011082972A1 (fr) 2009-12-15 2010-12-13 Dispositif pour séparer des gouttelettes de liquide d'un flux de gaz opérationnel contenant ces gouttelettes avec une charge de liquide > 101 de liquide/m3 de gaz opérationnel

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EP2512684A1 EP2512684A1 (fr) 2012-10-24
EP2512684B1 true EP2512684B1 (fr) 2015-03-11

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US (1) US8764886B2 (fr)
EP (1) EP2512684B1 (fr)
JP (1) JP5711758B2 (fr)
KR (1) KR101770356B1 (fr)
CN (1) CN102725070B (fr)
ES (1) ES2538822T3 (fr)
WO (1) WO2011082972A1 (fr)

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KR101770356B1 (ko) 2017-08-22
JP2013513475A (ja) 2013-04-22
EP2512684A1 (fr) 2012-10-24
CN102725070A (zh) 2012-10-10
CN102725070B (zh) 2014-03-12
US8764886B2 (en) 2014-07-01
WO2011082972A1 (fr) 2011-07-14
JP5711758B2 (ja) 2015-05-07
ES2538822T3 (es) 2015-06-24
KR20120101714A (ko) 2012-09-14
US20120285322A1 (en) 2012-11-15

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